MADRID 20.04.2026

Junior Administrative Accountant

Role Overview

Support our Administration and Accounting team in day-to-day financial and administrative tasks, from invoicing and accounting documentation to travel management and import/export coordination.

Be the operational backbone of a fast-growing space startup, where your attention to detail and proactivity make a real difference every day.

Junior Administrative Accountant

Responsibilities.

  • Manage the invoicing cycle, accounts payable/receivable, and accounting documentation.
  • Oversee corporate documentation, purchase orders, and internal payment requests.
  • Coordinate import/export operations, including shipment tracking, customs clearance, and documentation processing.
  • Manage corporate travel bookings and handle employee expense reports and reimbursements.
  • Provide general administrative and logistical support to the team and office.

Qualifications & Skills.

Must Have

  • Degree/FP in Business Administration, Accounting, Finance or related fields.
  • 1-3 years of proven experience in similar roles.
  • Familiarity with the full invoicing cycle (issuing, recording, filing)
  • Fluent in English and Spanish, both spoken and written.
  • Strong organizational skills and attention to detail.
  • Ability to adapt to changing priorities.
  • Proactive and able to work independently to solve day-to-day issues.
  • Excellent interpersonal communication and internal customer service skills.

Nice to Have

  • Previous experience in a startup or technology company
  • Knowledge of project management tools (ClickUp, Holded, or similar)
  • Interest in the aerospace sector
  • Experience with grant management or publicly funded projects

Benefits & Perks.

A key role in a pioneering space startup, where you will directly impact the development of cutting-edge propulsion technology.

FULL-TIME CONTRACT

A FULL-TIME CONTRACT OF 40H PER WEEK.

FLEXIBLE WORKING HOURS

ALLOWING YOU TO MANAGE YOUR SCHEDULE FOR BETTER WORK-LIFE BALANCE.

HYBRID WORK MODEL

WORK REMOTELY UP TO 9 DAYS PER MONTH.

EXTRA HOLIDAYS

IN ADDITION TO 23 VACATION DAYS, ENJOY 6 ADDITIONAL DAYS OFF DURING THE CHRISTMAS PERIOD (FROM 24 DECEMBER TO 2 JANUARY, BOTH INCLUDED).

PRIVATE HEALTH INSURANCE

PRIVATE HEALTH INSURANCE, FULLY COVERED BY THE COMPANY.

LEARNING BUDGET

€1000 PER YEAR BUDGET FOR TRAINING, COURSES, AND PROFESSIONAL GROWTH.

AUTONOMY AND RESPONSABILITY

YOUR CONTRIBUTIONS WILL DIRECTLY SHAPE OUR TECHNOLOGY AND SUCCESS.

OPEN POSITIONS.